Dust-guard



"1%. 752,164. PATENTE!) PEB. 16, 1904.

P. B. HARRISON.

D UST GUARD. APPLIOATIOK FILED .T UNB 25. 1903. no nonni..

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llllll 'IIL UNITED STATES Patented February 16, 1904.

ATENT Ormes.

A DUST-GUARD.

. SPECIFICATION forming part of Letters Patent No. 752,164, datedFebruary 16, 1904. Application filed June 25, 1903. Serial No. 163,032.(No model.)

To @ZZ whom it may concern:

Be it known that I, FRANK BnNJAi/in HAR- RisoN, a citizen ofthe UnitedStates, residing at Toledo, in the county .of Lucas and State of Ohio,have invente'd'new and useful Improve-- ments lin Dust-Guards for CarJournal-Boxes, ci' which the following is a specicatin.

The object oi' my invention is the production of a dust-guard forjournal-boxes which Shall eectively exclude dust, sand, andother foreignmatter from the interior .of the box and likewise prevent the escape ofoil therefrom, whichshall be comparatively simple in construction, cheapin first cost and durable, which will retain its proper position .withinthe chamber of the box when the brass wears away, which will not becomederanged by any cause whatever in practical service, and which withalshall possess such desirable features and characteristics as willconstituteit a superior means for performing the desired functions.

With the above ends in view my invention consists in certain noveltiesof construction and combinations and arrangements of parts, ashereinafter set forth and claimed.

The accompanying drawings illustrate an example and a modification ofthe physical embodiment of fmy invention constructed according to thebest mode I have so far deviselad for the practical application of theprincip e.

Figure 1 shows in dotted lines a journal-box and a journal and in fulllines my dust-guard in operative position, the box and guardl being insection, so as to clearly disclose the relative positions of the severalparts. Fig.

2 is a side view of the guard removed from the dust-guard chamber andenlarged. Fig. 3 is a view similar to Fig. 2, the halves of the framebeing separated to show the tongue upon the upper half of the frame andthe pins which retain the two halves in their proper positions. Fig.l 4is a section of a pin and the ring, taken on line w of Fig. 3. Fig. 5shows f the modification.

Referring to the several gures, the numeral 1 designates a journal-box,such as is in common use in connection with car-trucks; 2, thedust-guard chamber, open at the top, as usual;

3, an axle-journal, and 4 the dust-guard bearing of the axle.

The dust-guard is inserted at the top opening oi the chamber and islocated when in use as shown in Fig. 1.

The numeral 5 designates the upper half of the frame of the guard; 6, asemicircular tongue; 7 7 holes in the guard at the terminations of thetongue on each side of the'upper part of the frame; 8, the lower half ofthe frame; 9, the semicircular tongue upon the lower half of the frame;10, the pins rigidly secured to the lower half oi' the frame and thefree ends located within the holes 7 7 oi' the upper half; 11, themetallic ring, U- shaped in cross-section, acting as a spring; 12 13,the lapped free ends of the ring, and 14 is a wedge inserted in theopening of the dust-guard chamber to exclude dust and other Jforeignmatter.

It will be observed that the tongue upon the parts oi? the frame is ofthe greatest possible thickness and slightly less than the thickness oithe wood or other material constituting the frame, so as to be of greatstrength and to afford ample wearing material." The spring-ring isdesigned to frictionally engage the dust-guard bearing of the journaland to revolve with it, and to allow the ring to expand slightly thediameter of the same is less than the diametrical distance between theedges oi the tongue. When the ring is in position, the outer parallelsurfaces of the ring are in the same planes as the surfaces of the twoparts of the `frame, so that its outer surfaces will not wearexcessively by contact with the in- 'ner surfaces of the dust-guardchamber.

The lapped free ends should in practice be so shaped that there will notbe any open space between the ring and the journal for the passage oidust. In some cases I may make the ring integral and the flangeslappingover the edges of the frame.

In Fig. 5 is illustrated a modification. Upon the tongues 9 and 6 of thetwo sections of the frame is placed a U-shaped metallic ring 15, whichirictionally engages the tongue and which is not designed to revolve.vThe ring 11 loosely its the ring 15 and turns upon it. This arrangementprovides a metallic bearing-surface for ring 11, which will be moredurable than the tongue which directly receives the ring 11 in the mainexample.

From the foregoing description, taken in connection with the drawings,it becomes obvious that Ihave produced a dust-guard which fulfils allthe conditions set forth as the purpose of my invention.

' While I have specifically illustrated only one example and amodification of the physical embodiment of my invention, I do notthereby intend to limit -the scope thereof to such example andmodification, inasmuch as in practice colorable changes and modicationsmay be introducedl without constituting substantial departures.

What I claim as new, by Letters Patent, is-

1. The combination with a journal and a journal-box having a dust-guardchamber, of a frame with a circular opening therein, and a ring U-shapedin cross-section with its edges loosely lapping over the circular edgeof the frame and frictionally engaging the dustguard bearing-of the axleso as to revolve with the journal.

2. The combination with a journal, and a journal-box having a dust-guardchamber, of a frame with acircular opening therein, and a spring-ringU-shaped in cross-section with its ends breaking joints when in positionwithin the circular opening'oi the frame and its edges lapping over thecircular edge of the frame and loosely engaging the same.

3. rI`he combination with a journal and journal-box having a dust-guardchamber, of a frame made in sections with a circular opening, and a ringU-shaped in cross-section with its edges lapping over the edges of thesections oi the frame and loosely engaging the same so that the ring mayjourna L The combination with a journal and a journal-box having adust-guard chamber, of a frame provided with a circular opening with atongue, and a ring U-shaped in cross-section and loosely engaging thetongue and frictionally engaging the dust-guard bearing of the axle soas to revolve with the journal.

5. rlhe combination with a journal and a journal-box having a dust-guardchamber, of a frame having a circular opening with a tongue and aspring-ring U-Shaped in crosssection with free ends which overlap, saidring revolve with the and desire to secure or' the axle and looselyengaging the tongue of the frame.

6. A sectional dust-guard frame having a substantially circular openingand a ring U- shaped in cross-section loosely overlapping the edges ofthe opening and xed upon the dustguard bearing of the axle so as torevolve with the journal.

7. A dust-guard frame having a substantially circular opening, a ringU-shaped in cross-section surrounding the opening, and a second ringU-shaped in cross-section overlapping the first-mentioned ring U-shapedin cross-section and adapted to revolve in frictional Contact therewith.

two witnesses.

FRANK BENJAMIN HARRISON.

presence of Witnesses:

LnoLA G. VVENDELL, W. S. S'rnrnnnson.

frictionally engaging the dust-guard bearing- Intestimony whereof I aiixmy signature in-

